bradley



(No Model.)

H. W. BRADLEY. GAS 0R OIL MOTOR ENGINE.

No. 531,900. I Patented Jan. 1, 1395.

UNITED STATES PATEN" ruin.

HENRY IV. BRADLEY, OF MANCHESTER, ENGLAND;

GAS OR OiL MOTOR ENGINE.

SPECIFICATION forming part of Letters Patent No. 531,900, dated January 1, 1 895.

Application filed June 13, 1892. Serial No. 436,633. (No model.)

To aZZ whom it may concern:

Be it known that I, HENRY WENTWORTH BRADLEY, a citizen of England, residing at 18 Victoria Road, Manchester, in the county of Lancaster, England, have invented a new and useful Gas or Oil MotorEngine, of which the following is a specification.

This invention relates to means for starting a gas or oil motor engine, that is to say, giving the piston of such an engine an impulse whereby the flywheel is caused to revolve sufficiently for initiating the working of the englue.

The accompanying drawing is a longitudinal section showing part of the engine cylinder and starting apparatus arranged according to this invention as Will now be described.

0 is the rear end of the engine cylinder and P is part of the piston. L is the exhaust valve; M, the charging valve; N, the heated tube and valve for ignition. All these parts are of ordinary and well known construction and arrangement in certain types of gas and oil motor engines but may be constructed and arranged somewhat difierently in engines of other types.

According to this invention, in any convenient place at the rear end of the cylinder, there is provided an inlet furnished with a check valve J which can be closed tightly by a screw handle K or otherwise after the engine has been started. This inlet to the cylinder O communicates by a pipe Q with a vessel H which may be of tubular form as shown in the drawing, and preferably has a volume about equal to that of the engine cylinder. A hand pump is arranged to force on der moderate pressure a combustible mixture of air with gas or oil vapor into the vessel H. A pair of pumps may be employed for this purpose, the one for supplying air, the other for supplying the combustible; or the combustible mixture may be supplied by a. fan or other forcing apparatus or may be drawn in instead of being forced in, and in this case the draft of a chimney may be employed. In order, however, to simplify the manipulation and insure suitable proportions of the mixture one double acting pump such as is shown in the drawing may with advantage be employed. In this pump a long piston F passes in each stroke a middle port G by which the gas or vapor can enter past a light flap or other check valve E.

At each end of the pump there are discharge and suction valves A and B. As the piston F makes part of its stroke in either direction, air alone is drawn in through the suction valve B till after the piston passes the port G, the comparatively heavy suction valve 13 closes and the light valve E opens so that combustible gas or vapor alone enters the pump and mixes with the air in it,in proportions determined bythe depth of the piston and the length of its stroke. During the return stroke of the piston the mixture is expelled by the discharge valve A and passes into the vessel H. In communication with the pipe leading into the vessel H there is a port I closed by a spring valve 0 which can be opened by pressing on its stem D.

Such being the apparatus according to this invention, it is employed for starting the engine in the following manner: The piston P being placed at or having been moved to a point some distance forward along the cylinder and the valve J being opened while one of the valves L or M or other outlet from cylinder is open a mixture or air with combustible gas or vapor is pumped through the vessel Hjnto the cylinder 0 charging both. By depressing the stem D the valve 0 is then opened, and a dame is applied at the port I thusigniting part of the contents of thee-essel II. By expansion resulting from this ignition a considerable portion of the contents of H ispropelled into thecylinder 0 before becoming ignited thus putting the mixture in the cylinder in a state of compression, so that when the flame fromll reachesdt, or when it receives ignition from the heated tube N the piston P is propelled with considerable force causing such movement of the flywheel that, the valve J being closed the piston makes several strokes starting the engine which then goes on Working.

Having thus described the nature of my invention and the best means I know forcarrying the same into practical client, I claim- 1. The combination with an explosion chamber of a gas engine, of a supplemental explosion chamber connected with the first named chamber and an igniter for the supplemental chamber.

ICO

2. The combination with the explosion chamber of a gas engine, and an inlet valve therefor, of a supplemental explosion cham ber connected with the first named chamber, and an igniter for the supplemental chamber.

3. The combination with a gas or oil motor engine cylinder having an inlet controlled by der havinga valve-controlled inlet, of a pump, and a vessel communicating with the said inlet of thecylinder and having an igniting portand valve in communication With the vessel and arranged between the latter and the pump, substantially as and for the purposes described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 30th day of May, A. D. 1892.

' HENRY W. BRADLEY.

Witnesses:

. REGINALD S. MILFQRD,

B. W. DQWSON,

Clerks with lifessrs. Ounlijfe 0% Greg, Solicitors, ilfa'rwhester. 

